The layout of LAX is horrendous, security is pretty bad too.
Kiev Zhuliany airport is a tiny little box with nothing inside and information screens are almost non existent. When you do find one, it's often wrong.
Beijing airport is a massive airport with no substance and feels not only dangerous but missing connections is extremely common for everyone. Only max 2 staff members deal with international connections, you then have to join the regular security line for no reason to go through that whole process again. I've had a two hour connection time there before. An entire hour of it was just in the queue to get from the first plane to into security.
I always tell people this one story of Beijing airport. My first time there, I was tired and I completely forgot to take my phone battery out of my carry on. So it went under the x ray and the woman at security grabbed my bag screaming and demanding me open it and tell me what it was. As this happened, a man came up and just ripped my passport out of my hands and went around the corner. My bag was sorted and rescanned, then a few minutes later the guy came back to me and just shoved my passport back into my hands. I have no idea what he did with it, he said no words to me whatsoever.
I'm going to be going to JFK/LaGuardia/O'Hare in the next few weeks, so I'll see if they are as bad as you guys are saying.